Brake.



T. E. LINFOOT.

BRAKE.

APPLICATION FILED NOV. 24, 1913.

' Patented May 19, 191 1 2 SHEETSSHEET l.

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TIE. LINFOOT.

BRAKE.

APPLICATION IlLBD NOV. 24, ms.

! atented May 19 1914 S1LB1S- 11 Li A 3 vwaWw L 7. E. L IN F00 T ITHOMAS E. LINFGO'I, '5 FLICN'I, IllIICHIG'AN.

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specification of Letters Patent.

Patent-ed llllay llfl, it i l Application filed November 9 1', i913.Serial No. 302,?73.

this invention comprehends certain new and useful improvements in brakesand has for its primary object to provide il11 'lm' proved form of brakewhich will be com posed of a small number oi? parts and which Will beextremely simple as well as highly efficient in operation.

Another object is to provide a "brake which may be employed upon vehicleWheels such as automobile wheels and Which Will have double i'aced brakeshoes adapted for engagement with either the inner face of an outer drumor the outer face of an inner drum, as desired.

A further object is to provide a brake ct this character Which-Will bepositive in open oil ation and which may be readily assembled andadjusted. c

A still further object is to generally inr prove and simplify'theconstruction and op eration of devices of this character and provide abrake which may he used as service brake or an emergency brake, asoccasion may require.

"With the above and other objects in View, my invention consists incertain novel constructions, combinations, and arrangements of arts tobe hereinaiteimore fully descri ed, claimed, and illustrated in theaccompanying drawings, in which,

Figure 1 is a transverse vertical sectional view through the completedevice; Fig. Elis a longitudinal vertical section on. the line 2--2 ofliig. 1; Fig. is a detail sectional view on the line 83 of Fig. 2; andFig. l is a detail sectional View on the line i i oi Fig. 2.

teterring more specifically to the drawings in which similar referencecharacters designate correspendingparts throughout the several. views, 1designates the huh of an ordinary wheel having an inner brake drum 2 andan outer brake drum 3 fixed thereto. The axle casing -i projectsslightly into the inner end of the wheel huh 1 and has the annularoutwardly directed brake flange 5, to which is secured the brake flangedisk 6 which extends to the free circulate edge of theouter brake drum3, it being on (lei-stood that the outer brake drum projcc 1s inivardl yfarther than the inner bralige drum :2, thereby leaving a soace betweenthe inner brake drum 2 and the brake flange disk 6.

Between the inner and outer brake drums l have positioned a pair ofdouhleiaced brake shoes '2' adapted for engagement with. either saidinner or outer brake drum, as will be later clearly understood. Eachshoe 7 has inner and outer linings S and 9, re spectively, as clearlyshown in Fig. l, The brake shoes '1" are formed by directing at rightangles the outer edges of the brake shoe carrying plates 1.0 positionedagainst the brake flange disk 6 and secured in position against the11116 by the combination stop and guide pins 11 which are carried by thebrake flange disk 6 and extend through the vertical elongated guideslots 12 in the brain shoe carrying plates 10, said pins beingpreferably square in cross-section, the purpose of which will laterappear.

'lfhc combination stop and guide pins 11 are provided with transverseopenings 13 through which are engaged the opposite ends of the reverselycurved springs 14; which are held in proper position in the combinationstop and. guide pins 11 by the keys .53 on gagcd transversely throughsaid pins 11 for- Wardly of the springs 14. The central oiiset portionsof theqeversely curved springs 14; are engaged through the heads 16 ofthe vertical supporting members 1?, said heads 16 having the oppositelydirected cars 18 which are secured against the brake shoe carryingplatesby the bolts 19. The main portions of the vertical supporting members i?are spaced from theplates l0 and are connected with the latter by thepins :21 and 22 and upon which are mounted the rollers 23 anl 2 1respectively, hetween which are positioned the outer and inner cam ringsand 26, the outer cam ring being adapted for engagen'lent With therollers 23 on the pins 21 to force the brake shoes "I outwardly, Whilethe inner cam ring 26 is adapted for engagement with the inner rollers24 on the pins 22 to draw the brake shoes *1 inwardly. it will also heunderstood that the brake rings 25 and 26 are also positioned betweenthe main portions of said plates 10 The outer cam ring 535 has theopposite cam portions upon its outer 'vcriphery which are normallypositioned adjacent the rollers 23, whereby when the ring is rotated inthe-proper direction, said cum portions 27 will engage said rollers 23and force outwardly the deuble-faced brake shoes 7 and engage the outerlinings 9 of the same with the inner face/of the outer brake drum 3. Theinner cam ring is provided with the opposite cam portions 28 which arenormally adjacent the inner rollers 24 upon the pins 22 and will engagesaid rollers and thereby draw the double-faced brake shoes 7 inwardlywhen the inner cam ring 26 is rotated in the proper direction. The innercam ring 26 is adapted for rotation around the outwardly directedannular flange 29 carried by the brake flange 5 which flange 29 isprovided with opposite openings 30 to accommodate the flanged portions28 of the ring 26 and the inner ends of the vertical supporting members1 7 and brake shoe carryingpl'ate 10, as will be c early understood byre ferring to the di'hwings. The outer cam ring 25 has an car 31projecting from its periphery and upon the opposite sides of which arepivoted the inner ends of the con-.-

nccting links 32 by the pivot pin 33, the outer ends of said connectinglinks 32 being pivoted upon the pivot pin 34 carried in the free end ofthe arm 35 projecting laterally from the rock shaft or other operatingmeans (not shown) may )c connected for operating said rock shatt 52-6and thereby rotating the outer cam ring 25 in the proper direction. Theinner cam the connecting ring 26 has the inner ends of links 37 nvotedthereto h the ivot in 38 a J l P while the outer ends of said connectinglinks 34 are mounted upon the pivot pin 39 carried in the outer end ofthe arm 10 projecting laterally from the rock shaft 41 to which may alsobe connected a lever or other suitable operatio means (not shown) forrocking said shart 41 and thereby rotating the inner cam ring 26 in theproper direction, as will be clearly understood.

From the foregoing, it will be parent that in ordinary service, theoperating means connected with the rock shaft ll is properly manipulatedto rotate the inner cam ring 26 to cause the cam portions 28 thereof towork upon the rollers 24 and thereby draw inwardly the verticalsupporting members 17 and the brake shoe carryingplates 10, engaging theinner linings 8 of the double-faced brake shoes 7 with the inner brakedrum 2. As soon as the rock shaft 41 is allowed to return to normalposition, however, the reversely curved springs 14- will serve to returnthe brake shoes to their normal positions, thereby causing the innerrollem 24. to assist in returning the inner cam ring 26 to its normal orinoperative position. It will be understood that movement of the innercam ring 23 in either direction will be limited by the end walls of theopposite openings 30in the flange 29 around which said inner cam ring 26rot-ates and by means 36 to which any suitable.

clezirly apof which said inner cam ring 26 is retained in properposition. When an emergency brake is required, however, the operatingmeans for the rock shaft 36 is properly manipulated to rock said shaft36 in the proper direction to rotate the outer cam ring 25 to bring theopposite cam portions 27 thereof into engagement with the outer rollers23 and thereby force the double-faced brake shoes 7 outwardly and theouter lining 9 thereof into engagement with the outer brake drum 3.

While I have shown the preferred embodiment of my invention, it will beunderstood that minor changes in the details of'con struction andarrangement of parts may be made within the scope of the appended claimswithout departing my invent-ion or sacrificing any of the ad vantages ofthe same.

What, I claim is l. A device of the class described comprising thecombination with spaced inner and outer brake drums, of a double-facedbrake shoe positioned therebetwcen and adapted for engagement witheither of said brake drums, and means for normallyuretainin said brakeshoe in spaced relation to sai brake drums.

2. A'device of the class described comprising the combination with aninner brake drum and an outer brake drum, of a doublefaced brake shoe,means for supporting said brake shoe, means for resiliently retainingthe brake shoe in normal for forcing thdbrake with the inner brakeforcing the brake shoe the outer brake drum.

3. A device of the class described comprising the combination with innerand outer rake diUHiS, of a brake shoe positioned therehetween, meansfor retaining the brake shoein spaced relation to said brake drums,means for forcing the brake shoe into engagement with the inner brakedrum, and means for forcing the brake shoe into engagement with theouter brake drum.

4. A device of the class described comprising the combination with innerand outer brake drums, of a brake shoe positioned between said brakedrums, means for supporting said brake shoe, means for forcing the brakeshoe into engagement with the inner brake drum, means for forcing thebrake shoe into engagement with the outer brake drum, means forreturning the brake shoe to normal position, and ineans for guiding saidbrake shoe.

5. A device of the class described comprising the combinatio with a hub,an inner brake drum and an outer brake drum carried by said hub, of abrake flange disk, means for supporting said brake flange dish, a brakeshoe-carrying member mounted for position, means shoe into engagementinto engagement with drum, and means for from the spirit of movementupon the brake flange dish, a double-faced brake shoe carried by thebrake shoe-carrying member and positioned between [he brake drums, saiddouble-faeed brake shoe being normally in inoperative position, meansfor forcing the brake shoe into engagement with the inner brake drum,means for forcing the brake shoe into ongagement with the outer brakedrum, means for guiding; said brake shoe, and means for retn'ning,- thebrake shoe to inoperative position.

6. A device of the class described comprising the combination with ahub, an inner brake drum carried by said hub, an outer brake drumcarried by said hub, of a stationary member, a brake flange disk carriedby said stationary member, a brake shoecarryin member mounted on saidbrake flange risk and having a right angled portion forming adouble-faced brake shoe, a vertical supporting member secured to thebrake shoe-carrying member, means for conmeeting said verticalsupporting member and said brake shoe-carrying member, rollers mountedon said connecting means, cam members positioned between said verticalsupporting member and said brake shoe-carrying member and. between theinner and outer connecting means, means for operating the outer cammember to force the same into engagement with the rollers mounted on theconnecting means and thereby move the double-faced brake shoe outwardlyand into engagement with the outer brake drum, means for operating theinner cam member to force the same into engagement With the rollersmounted on. the inner connecting means and thereby move the brake shoeinwardly and into engagement with the inner brake drum, means forguiding the brake shoe, and means for resiliently retaining said brakeshoe in normal position.

7. A device of the class described comprising the combination with a huband a stationary member, of inner and outer brake drums rigid with saidhub, double-faced brake shoes positioned between said inner and outerbrake drums, an outwardly rected flange carried by said stationaiymember, brakeshoe supporting means, vertical supporting members, meansfor connecting said vertical supporting mom! and the brake shoesupporting means, r ersmounted on the last mentioned in said outwardlydirected flange being vided with oppositely disposed openings, saidbrake shoe-carrying means and vertical sup orting members being extendedthrough sai openings, means positioned between the rollers and mountedupon the outwardly dirooted flange for moving the doublofaced brakeshoes inwardly and out-Wardiy to en-- gage the same with the inner andouter brake drums, means for operating the last mentioned means, meansfor guiding the brake shoes, and means for resiliently re taining thesame in normal position.

In testimony whereof I her amto aiiix my signature in the presence oftwo witnesses.

THOMAS E. LIN FOOT. Witnesses: Cnmmns E. HnNnmoKs,

CHARLES Tnos. SGANNELL.

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